Machine for making paper boxes



July 3, 1934. J. ZANETTI MACHINE FOR MAKING PAPER BOXES 4 Sheets-Sheet l 4 Filed June 1v. 1929 July3, 1934. J. zANE-rl MACHINE FoR MAKING PAPER oxs Filed June 17, 1*929 4 'sheets-sheep 2f l mento@ 65e/nk Zalzel-zl Cdrom, l

July 3, 1934. J. ZANETTI I MACHINE FOR MAKING PAPER BOXES Filed Jne 17, 1929 4 sheets-sheet 5 gra/vanto@ amg.

July 3, 1934- J. zANi-:m 1,965,274

MACHINE FOR MAKING PAPER BOXES Patented July 3,v

y UNITED@ srA'res PATENTE OFFICE MAcmNE .Fon MAKING rAPE Boxes Joseph Zanetti, San Francisco, Calif. Application :une 11, 1929. serial No. 371,391

` This invention relates to a machine for making paper boxes and more particularly to a machine for forming boxes having glued tabs.

Among the objects of the invention is to provide resilient formingmeans.

Another object is to hold the boxes after being formed until the glue is set.

Another object is to feed the box blanks singly to the forming mechanism immediatelyeafter bepanying drawings, the invention is disclosed in its preferred form, but it is to be understood that it s'not limited to that form because it may be' embodied in other forms. It is also to be understood that in and by the claims following the description it is desired to cover the invention in whatsoever form it may be embodied.

In the four sheets of drawings:

Fig. l is a front elevation of a machine constructed in accordance with this invention.

Fig. 2 is a front elevation of a.l box produced by this machine.

, Fig. 3 is a side elevation of the same.

Fig. 4 is an enlarged fragmentary front elevation of the forming mechanism of the machine with parts broken away for purposes of illustration.

Fig. 5 is a front view of a portion of the'forming mechanism.

Fig. 6 is a side elevation of the machine showing the forming mechanism and the chute which receives the boxes after they are formed.

' Fig. 'l is a horizontal section.y view of the box chute Y Fig. 8 is a side elevation of a portion of the` drivenA by suitable means. The roller 5 supplies the roller 4 with liquid parafiine from the container 6 inwhich the roller 5 revolves.

The motor 12 rotates the shaft 9 by means of. the pulley 14 mounted thereon 4and the belt 13. 60 The shaft 9 is'journaled on vthe frame 10 on the base 11. v e

The paper is fed intermittently from the roll 1 by the rollers 15-16 which a're geared together. with the g/ear 17.1 The pawl 19 on the arm 18 engages the gear 1'? to drive it in one direction as the arm 18 reciprocates. The connecting rod 20 is pivoted. onr the crank wheel 21 which is mounted on the driving shaft 9. l

The blanks are cut and scored by the die 'I which is reciprocated by the eccentric 8 on the shaft'9.

The blanks after being cut are conveyed to the forming mechanism vby the pair of contacting belts 24-25.

At. the discharging end of the belts 24 25, the .edges ci the blanks vpass into the channels 22-23. The blank is then moved into position in the forming mechanism by the friction wheels 2li- 29, Btl- 3o on each side. The upper wheels 30--30 are held in resilient relation to the wheels 29-29 by the springs 31--32. These expand be- Vtween the journals 30 of the wheels 30 and the nutson the bolts Bil- 34. 85

The wheels 29-29 are driven by the belts 37- 3'? which engage the pulleys 36-36 on the wheels 29. The other ends of the belts 37 engage the pulley 38 which is rotated by the belt 24.

The friction wheels grip the edges of the paper blank and convey it into position in the forming mechanism until the blank strikes the stop 35. The stop 35 is rendered adjustable bythe setscrews 40 which-passthrough the slot 39 in the '111e construction and arrangement of the forming mechanism are as follows:

The sprocket 59sis mounted on the driving shaft 9 and meshes with the chain 58 which drives the sprocket 57 and the shaft `5t upon which it 100 is mounted.

The crank wheel 54 is rigidly mounted on the shaft 56 and reciprocates the connecting rod 55. The rod 52 is slidable in the journal 53 and is pivoted tothe connecting rod 55. The plunger 51'is fixed to the lower end-of the rod y52 and is moved up =and downA thereby.

Glue is amilied to Ivpredetermined points on the blank by the following means: The glue reservoirs v60,--61 are mounted on opposite sides u@ The gear ofthe roller 16 is enmeshed 65 sov of the bar 62. 'I'he T pipes 64-64 are connected to the reservoirs. The valves 63-63 are provided in the T pipes to regulate the ow of the glue. The tubes 65-66 lead from opposite ends of the T pipe on each container. The distributing nozzles 67--67 are telescoped in the end of each of the tubes 65-65, 66-66. The flow of the adhesive glue to the nozzles is regulated by the valves 71-71 provided therein.

The nozzles are mounted on the levers 68-68 which fulcrum on the shafts 69-70. The cranks 'Z8-80 are mounted on the shafts 69-70, which are provided with the rollers 77-79.

'Ihe cam 72 is mounted on the shaft 73 vwhich is rotated by the sprocket 74. 'Ihe driving chain 75 meshes with the sprocket 76 on the shaft 56. 'I'he cam 72 is so arranged as to, strike the rollers 77-79 simultaneously as it rotates'.

The tabs of the blanks are thrust inside the box by mechanism which is constructed as follows: The plates 815-86 are positioned below the plane of the incoming blank and are pivoted on the shafts 87-88 which are journaled in the blocks 91-92. The blocks are formed in one piece with the slides 91-92' which enter the recesses 93-94. The slides are pressed outward by the springs 97-97 in the recesses 93-94. 'I'he slides may be adjusted by the nuts 100 on the bolts 99, which are fixed to-the slides 91'-92 and which pass through the plates 98. While the plunger is withdrawn from the forming mechanism, the plates 85-86 are held in a horizontal position by the springs 81-81.

The plates 85-86 are provided with the angle plates 101-102 at the corners. 'I'he plates 101-102 fulcrum at 103-103 and are operatively held by the spring 104 to contact the sides of the plates 85-86.

The rollers 89-90 are placed below the plates 85-86 for a purpose hereinafter described. The rollers are mounted on the blocks 89-90 which may be adjusted by the setscrews 89"-90".

The blocks are locked in adjusted position by the Any shape or type of box may be produced by this machine by altering the sizes .and proportions of the mechanism shown in the drawings. One size and type is illustrated in Figs. 2 and 3. The box comprises the integral blank 41 which is formed into a box having the sides 42-45, the ends 43-44 and the bottom 46. The tabs 47-48, 49-50 on the opposite ends 43-44 of the box are glued to the sides 42-45 to hold the box together.

'lhe operation of the forming mechanism is as follows: While the plunger 51 is yet in raised position, the cam .72 displaces the cranks 'Z8-80 and lowers the levers 68. Thedistributing nozzles 67 are then depressed and contact the blank which is in position ready for forming. As the movement of the nozzles continues, the glue is distributed over predetermined areas of the blank.

When the cam 72 leaves the rollers, the nozzles 67 are restored to position by weight of the cranks 78-80.

The plunger 51 then descends and presses down the glued blank. The plunger then contacts the extensions 83-84 of the plates 85-86, forcing the' plates upward to contact the blank on the plunger 51. This folds the ends 43-44 of the blank upward and presses themlagainst the sides of the plunger.

As the downward movement of the plunger continues, the beveled sides of the plunger force the plates -86 backward against the tension of the springs 97.

. lows:

When the ends 43-44 are folded upward, the tabs 47-48, 49-50 are folded inward by sliding contact with the plates 101-102 which press the tabs against the adjacent sides of the plunger.

Continued movement of the plunger swings the plates 101-102 backward on the pivots 103-103 against the tension of the contractile springs 104.

Subsequent to folding of the ends 43--44 and the integral tabs, the sides 42-45 are folded upward, outside the tabs 47-48, 49-50 as the plunger passes the rollers 89-90. The sides of the box are pressed upward by contact with the rollers and are glued to the tabs of the box by the glue previously distributed thereon.

After the box has been formed, the plunger lowers thebox still farther and telescopes it in the preceding box at the top of the stack of previously formed boxes in the chute 105.

'I'he chute comprises the interspaced corner angles 106--107-108-109 which enclose the stack of telescoped boxes. The guides 110-111 are in alignment with the corner angles and are provided with suitable adjusting mechanism to effect a variable pressure of the guides upon the boxes.

The adjustment is accomplished as follows: The cross bars 112-112 extend between the corner angles behind the guides 110-111. The set screws 113-113 are threaded in the cross bars and carry the guides 110-111. Adjustment of the screws moves the guides to or from the stack of boxes Ratchet teeth such as 114 may be provided to prevent. upward movement of the boxes after being telescoped to form the stack.

The endless chains 115-115 are provided on opposite sides of the chute and have the flat lugs 116 which vengage the sides of the stack of boxes. The channels 115-116' enclose the chain and hold the lugs 116 in engagement with the boxes. The pressure of the lugs against the boxes may be varied by adjustment of the position of the channels. This is effected by the set screws 107' which are threaded in the cross bars 108 and which bear on the channels. The upper ends of the chains are carried by the sprockets 117-117,

118-118. The sprockets 119-120 engage the` lower ends of the chains and impart an intermittent driving movement thereto.

These sprockets are driven in the following manner: The sprocket 126 on the drive shaft 56 engages the chain 125 which drives the sprock- The short levers 139-140 are fulcrumed on the shafts 134-135. The rods 141-142 are connected to the levers 139-140 and to the levers 143-144. The shafts 145--146 mount the sprockets 119-120 and carry the levers 143-144. The ratchet wheels 151-152 are fixed on the shafts 145-146 adjacent the levers 143-144. The pawls 149-150 are pivoted on the levers 143-144 and engage theratchet wheels.

The mechanism of the chute operates as fol- The crank wheels 127-128 are driven by the sprockets 123-124 and impart an oscillating movement tothe levers 129-130. The rods 141-142'transmit the movement to the levers 143-144. The pawls 149-150 engage and drive the ratchet wheels in one direction. This gives an intermittent movement to the chains 115-115 which move the boxes downward one step as each box is formed and telescoped into the existing` stack.

The chute is preferably sumciently long to allow the glue on the form'ed boxes to harden before they are discharged from the chute. The

chute terminates in the horizontal portion 105" from which the completed boxes are removed.

Having thus described this invention what I claim and desire to secureby Letters Patent is:

pivoted plate on opposite side `of said plunger..

a projection on said plate in thepath of motion .of said plunger, a pivoted angle plate on each end of said pivoted plate, a spring to hold said angle plates on the angle of the comer of the box to allow the plunger to pass below the pivoted` plate, and means to drive said machine intimed relation. 1

2. A paper box making. machine comprising a frame, a reciprocating plunger on said frame, means to feeda boxblank under said plunger, means to apply glue to predetermined portions of the blank; a resiliently mounted block on the opposite side of the plunger, a plate mounted on each of said blocks, a projection on said plate in the path of motion of .said plunger, a pivoted angle plate at. each end of each of the pivoted plates, and rollers mounted in juxtaposition with said pivoted plates.

3. A paper box making machine comprising a frame, a reciprocating plunger on said frame, means to feed a' b ox blank under said plunger, means to apply glue to the blank, resiliently mounted blocks on opposite sides of the plunger, a plate pivoted on each of said blocks, a vprojection in the path of motion of said plunger, an angle plate pivoted at each end of each of said pivoted plates, resilient means for holding said angle plates against the ends of said pivoted plates, rigidly mounted rollers in juxtaposition with said pivoted plates, and a chute adjacent said rollers.

4. A paper box making machine comprising a means to feed a blank under said plunger, means to apply. glue to the blank, resiliently mounted blocks o'n opposite sides of said plunger, plates pivoted on said blocks, projections on said plates in the path of motion of said plunger, angle plates pivoted on opposite ends of said pivoted plates, resilientmeans for drawing said angle plates together against the ends of said pivotedplates, rigidly mounted rollers in juxtaposition with said pivoted plates, a chute adjacent said rollers, and

means for intermittently moving the boxes 4along said chute. j

5. A paper box making machine comprising a frame, a reciprocating die on said frame and adapted toV cut blanks from a roll of paper, a reciprocating plunger mounted lon said frame, means to feed the paper blank from said die to a predetermined position vunder said plunger, means to apply glue to predetermined portions of the blank, a pair of resiliently mounted blocks on opposite sides of said plunger, a pivoted plate on each of said blocks, a 'projection on each of 'said plates 'extending into the path of movement ofv said plunger, a. pivoted angle plate on each end of said pivoted plate, resilient means for holding said angle plates against the ends of the pivoted plate, rigid rollers in juxtaposition to said pivoted plates, a chute adjacentsaid rollers, a stack of previously formed boxes telescoped within each other in said chute and adapted to telescope succeeding boxes, and means to move intermittently said stack along said chute. Y

l6. A paper box making machine comprising frame, a plunger adapted to form paper boxes mounted on said frame, means to feed a paper blank under said plunger, a glue container, a nozzle flexibly connected with said'glue container, and means to press said nozzle against the paper blank.

'1. A paper box machine comprising a frame, a reciprocating plunger mounted on said frame and adapted to form paper boxes, means to feed a blank under said plunger,l a glue container mounted on said frame, a nozzle flexibly connected with said container and adapted to receive a continuous flow of glue therefrom, and means adapted to press said nozzleagainst the blank. 

